A convergent and efficient formal synthesis of (±)-atisine has been accomplished. The synthetic strategy is to efficiently construct the bicyclo[2.2.2]octane ring moiety by an oxidative dearomatization/intramolecular DielsâAlder cycloaddition cascade. The first total synthesis of another atisine-type C20-diterpenoid alkaloid, (±)-isoazitine, has also been achieved employing the same strategy.
我们完成了(±)-
天冬氨酸的聚合和高效正式合成。合成策略是通过氧化脱
芳烃化/分子内 DielsâAlder 环加成级联反应,高效地构建
双环[2.2.2]辛烷环分子。采用相同的策略,还首次实现了另一种阿替嗪类 C20-二萜
生物碱--(±)-异氮嗪的全合成。